BostonGlobe.com Political Headlines - April 3, 2014 April 03, 2014 Here are the top political headlines from BostonGlobe.com today: Supreme Court ends overall limits on political donations: The court ruled that it was unconstitutional for government to limit the amount of money an individual can give to all federal candidates, parties, and PACs. Tracy Jan and Matt Viser report from Washington. When a selfie becomes an endorsement: David Ortiz’s selfie with President Obama raises new questions about what is advertising on the Web and what isn’t. Tech reporter Michael Farrell reports. Domestic violence laws are not applied equally: The Jared Remy and Carlos Henriquez cases show how domestic violence charges can be treated differently, writes columnist Joan Vennochi. Fueling a heat and eat rebellion: A GOP effort to tie heating assistance to food stamps has been met with resistance, writes columnist Derrick Z. Jackson.